Ross Sea Region Soil Sites
421000
421
12-Nov-1978
IBC, GGC
Darwin/Hatherton Glacier, Darwin Mountains Transantarctic Mountains
Soil weathering examination
United States Geological Survey 1966; 1:250,000 Carlyon Glacier Antarctica
CS Pro & Lscp
No
156.8000
-79.9133
79deg 54.8'S
-156deg -48.0'E
Approximately 4.5km NE of Mount Ash on the east side of a large depression; a moraine surface which forms part of a sequence of surfaces marked by a succession of |
moraine loops |
10
NE
1,050
cf. Notes for GEOLAND below
Snow in patterned ground cracks; no thaw or soil moistening
-25
Central Mountain
Bouldery gravel till from predominantly dolerite with sandstone and minor granite
Nil observed
Active nets with 1m relief; probably ice cored
SURFACE WEATHERING or |
SURFACE FEATURES |
Surface is non pavementic; dolerite clasts moderately oxidised; granite and sandstone weakly oxidised; many large surface boulders from 2-3m, most |
.75-1m; some boulders split; no ventiforms or cavernous weathering |
Nil
421a 2-0cm
101
surface cobbly to bouldery sandy gravel
102
angular to subrounded and variable surface staining,
421b 0-4cm
201
yellowish brown (10YR 5/4) sandy cobble gravel
202
weakly cohesive
203
few distinct salt flecks
204
rock particles subangular and weakly stained
205
distinct boundary,
421c 4-45cm
301
light olive brown (2.5Y 5/4) bouldery sandy gravel
302
weakly cohesive
303
rock particles angular and unstained
304
sharp boundary,
421d 45-50cm
401
light olive brown (2.5Y 5/4) ice-cemented ground
Yes
Hard ice-cemented
45
3
(45cm)
Geoland
Local rocks are Ferrar Dolerite and Beacon Sandstone; the till includes some granite which is widespread lower down the Darwin Glacier, the moraine |
topography including the shape of terminal loops strongly suggests an ice advance into the valley; a much younger event than Asgard till of the Wright Valley |
Soluble Salt |
Concentration |
42100001
28.00
42100002
84.00
42100003
68.00
42100004
39.00
42100001
42100002
42100003
42100004
42100001
42100002
42100003
42100004
12-Dec-2005
Page 378 of 896
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